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Author Topic: Buy or Build? Vintage accessory FSK-Unit for NSD-505 by JAPAN RADIO Co.  (Read 90 times)

DH5AK

  • Member
  • Posts: 18

I am a RTTY freak. I soon will have a NSD-505 transmitter in my hands which was built by JAPAN RADIO Co. (JRC). This transmitter was intended to work with is official companion, the NRD-505 receiver. However, it also works transceive with the slightly newer NRD-515 - which I have in my shack.

There was an optional RTTY plug-in board available, named "FSK-Unit CGD-36". I would like to find such a board. All this gear is from the early 80s! So it is hard to find.

I suppose that I do not need to explain here, why I want to use this RX/TX-combo and not any other transceiver.
I simply love them - this is sufficient reason to ask here, I think.

What I think would be helpful is the following:

- The emntioned optional board would be helpful, if somebody has such a board waiting for me in his shack.
Yes, I am kidding a bit - but who knows...? Maybe you know a JRC-collector whom I could ask. Asking contains the
risk of a positive answer - generally spoken  ;)

- Some helpful suggesions where to look or whom to ask for such very special gear - JRC was not THAT common in the
US.
I am not able to read or speak or understand Japanese. But if you know a dealer or another helpful contact in JA or
somewhere else, I will not hesitate to ask by mail or snail mail or...

- The matching conncectors which are soldered on such a FSK-board would be quite helpful as well.
I even would build one myself. This does not look THAT complex: A VXO shiftet by a varicap, the shift is set for mark
and space for 170Hz and 850Hz with four trimpots. The conncector is the key element to start...

Maybe you have further ideas or you can help to answer one of the three mentioned topics.

vy 73 de Andy DH5AK


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N8YX

  • Member
  • Posts: 2449
Re: Buy or Build? Vintage accessory FSK-Unit for NSD-505 by JAPAN RADIO Co.
« Reply #1 on: November 19, 2019, 12:57:48 PM »

Check eBay.

NRD items (including the 505 series plus accessories) periodically surface.

If I could source all the parts I'd homebrew one. Did this a number of times for older gear I have.
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LAJ2

  • Posts: 1
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Re: Buy or Build? Vintage accessory FSK-Unit for NSD-505 by JAPAN RADIO Co.
« Reply #2 on: December 26, 2019, 05:09:01 AM »

I am a RTTY freak. I soon will have a NSD-505 transmitter in my hands which was built by JAPAN RADIO Co. (JRC). This transmitter was intended to work with is official companion, the NRD-505 receiver. However, it also works transceive with the slightly newer NRD-515 - which I have in my shack.

There was an optional RTTY plug-in board available, named "FSK-Unit CGD-36". I would like to find such a board. All this gear is from the early 80s! So it is hard to find.

I suppose that I do not need to explain here, why I want to use this RX/TX-combo and not any other transceiver.
I simply love them - this is sufficient reason to ask here, I think.

What I think would be helpful is the following:

- The emntioned optional board would be helpful, if somebody has such a board waiting for me in his shack.
Yes, I am kidding a bit - but who knows...? Maybe you know a JRC-collector whom I could ask. Asking contains the
risk of a positive answer - generally spoken  ;)

- Some helpful suggesions where to look or whom to ask for such very special gear - JRC was not THAT common in the
US.
I am not able to read or speak or understand Japanese. But if you know a dealer or another helpful contact in JA or
somewhere else, I will not hesitate to ask by mail or snail mail or...

- The matching conncectors which are soldered on such a FSK-board would be quite helpful as well.
I even would build one myself. This does not look THAT complex: A VXO shiftet by a varicap, the shift is set for mark
and space for 170Hz and 850Hz with four trimpots. The conncector is the key element to start...

Maybe you have further ideas or you can help to answer one of the three mentioned topics.

vy 73 de Andy DH5AK

Emntioned optional board would be helpful indeed but I am not fully on this side.
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